Covering for draft-rollers, &amp;c.



'z. T. SUBERS. GOVERING FOR DRAFT ROLLERS, 6w.

APPLIOATION FILED JUNE 1, 1908.

0 1 Patented Oct. 26, 1909.

UNITED STATES PATENT OFFICE.

anon Am? 'r. sUBEns, or PHILADELPHIA, PENNSYLVANIA, nssxenon or ONE-HALF T0 FRANKLIN B. BIRCH, PHILADELPHIA, PENNSYLVANIA.

COVERING FOB DRAFT-BOLLEBS, &c.

. Specification of Letters Patent. I Patented O t. 26 1909 Application men June 1, 1908. Serial No. 436,096.

To all whom it may concern:

Be it known that I, ZAGHARY a citizen of the United States, residing 111 Philadelphia, Pennsylvania, have invented certain Improvements in Coverings for 'Draft-Rollers, &.c., of which the following is' a specification.

The object of my invention is to provide a composition for use in place of leather, rubber,felt, or like materials for the covering of draft rollers, wheels pulleys, aprons,

belts, drums, or like structures which are mtended to exert a tractive eifect upon textile threads, strands or other materials upon which .they act, the term roller bemg hereinafter, for convenience, used in this I improved composition applied thereto. 1

The object of my invention .has been to provide a compound having rubber or guttapercha as a base, for the purpose of impartmg the desired cohesiveness, but differing from ordinary vulcanized rubber in having a fine,

granular structure. and offering such resistance to compression that its surface can be,

' buffed or sandpapered so as to render it perfectly level and uniform throughout.

The compound comprises-rubberor guttapercha, sulfur, or other vulcanizing agent, and ground leather, either alone or combined with ground "cotton, or other textile fiber, a loading or weighting agent, such as zinc white or its equivalent, being also, by preference, added to the compound in order to give it the required body. The following formula is one .which has been found. to give good results rubber or gutta-percha,- 3 kilograms, sulfur-,900 grams, ground leather- 500 grams, ground cotton or other textile fiber500 grams, zinc white- 0 grams. Departures from the proportions here given may, however, be made-withinthe scope of my invention, depending upon the purity of the rubber employed or the conditions de-'.

sited in the fimshed product, the rule being that the less the amount of ground leather and textile fiber employed in the compound the more nearly w ll 1t resemble ordinary vulcanized rubber. 1

While I find it advisable,in all'cases, to

T. Sprints,

to it a certain amount of resiliency and.

leather, the latter alone, in correspondingly increased 'proportion, may be employed if combine ground textile fiber with the ground desired; In some cases, also, I add about 250 grams of oxid of antimony, which serves the double purpose ofan' electrical non-conducting agent and a loading or weighting ingredient.

The compound, in a plastic or semi-plastic tate, may be pressed into a mold of which the body or hub of the desired roller constitutes the core, and the compound is then vulcanized in the ordinary way while in the mold. The body ofthe roller may be of any desired material which will withstand, the heat, necessary for the vulcanization of the covering compound. Upon removal from the mold the roller will have a continuous covering consisting of a homogeneous, cohesive mass, of fine, granular structure, and, while possessing all necessary elasticity it will olfer such resistance to compression, that its surface can be rendered perfectly true b bufling, grinding, sandpapering or any 0t er like method.

he tractive effect ofa roller covered with my improved composition is much greater than one covered with rubber, leather, felt, cork,.or any of the other coverings ordi narily applied to draft rollers and with which I am familiar, experience having demonstrated that a roller covered with my improved compound can be operated with aboutone-half of the expenditure of power required for the operation of a leather covered roller, this being probably due to the lessened friction arising from the decreased amount of weight necessary to be exerted upon the materlal under treatment in order to press it into con-tact with the tractive surface of the roller.

My improved compound is a non conductor of electricity which is an added 'advantage in the case of draft rollers for textile machinery, as it prevents the disorganization of the fibers which frequently results frori a static charge in the rollers ordinarily use 1 I am aware that it has heretofore been proposed to produce compositions c'ontaim ing rubber or' gutta-percha, a vulcanizing agent and fibrous material, the latter being but i. am not aware that it has here-' tofore been prop leather with-a. vu

osed to "combine grouiid canizable rubber or guttapercha compound, or that it has ever been proposed to provide ardraft roller or equivalent device with a continuous, homo eneous covering'or coating consisting of .ru ber or f gutta percha a vulcariizing agent, and

ground fibrous material, such as leather, tex-.

tta-percha,

I a vulcan' ing'agent, ground leather, and a f-weighting or loading lngredient.

a .vulcanizing agent,

rial, a loading or weig ting ingredient, and

3. A com osition for the purpose de scribed, consisting-of rubber or .gutta-percha, a vulcanizing agent, ground leather, ground textile fiber, and a weighting or loading agent. v

4.,A composition for the purpose described, consisting of rubber or lgutta-percha,

a. vulcanizin a ent, ground rial, and oxi o antimony. v 5'. A composition for the purpose described,--cons1sting of rubber or tta-percha,

ound brous matebrous mate- 6. A draftrol er or like structure having a continuous, homogeneous and cohesive surface covering or coating composed of rubber,

for the purpose deent, ground eather, and,

a vulcanizing agent, and ground. fibrous material.

7. A draft roller or like" structure having acontinuous, homogeneous and cohesive sur-' face coating or coverin composed of rubber, a vucanizin agent, an ground leather.-

8. A dra roller or like structure having a continuous, homogeneous and cohesive surface coating or covering composed of rubber,

'a vulcanlzmg agent, ground leather and ground textile fiber.

I 9. A draft roller 01' like structure having a continuous, homogeneous and cohesive sur- 1 'facecoating or covering composed of rubber,

a vulcanizing agent, ground leather, ground fibrous material, .and a loading or weighting ingredient.

- 10. A draft-roller or like structure having a continuous, homogeneous and cohesive surface coating or covering composed of'rubber,

a vulcanizing agent, ground leather, ground fibrous material, andoxid of antimony. 11. Adraft'rolleroi' like structurehavi'ng a continuous, homogeneous and cohesive surface coating or covering com osed of rubber, a vulcanizing agent, ground' brous'material,

a loadingor weighting material, and oxid of antimony.

In. testimony whereof, I have slgned my name to this specification, in the presence of two subscribing witnesses.

ZACHARY T. SUBERS.

Witnesses:

-"HAMILT0N 'D. TURNER,

KATE A. BnAnLn. 

